How to check if there are any "stuck compactions"?
> Date: Sun, 8 Jun 2014 12:43:45 -0400 > From: wkat...@cs.rutgers.edu > To: user@cassandra.apache.org > Subject: Re: high pending compactions > > Have you verified that these aren't "stuck compactions"? e.g. even under > no load, they don't go away? > > -Bill > > > On 06/08/2014 12:32 PM, Jake Luciani wrote: > > 2&3 > > > > On Sunday, June 8, 2014, S C <as...@outlook.com > > <mailto:as...@outlook.com>> wrote: > > > > I am using Cassandra 1.1 (sorry bit old) and I am seeing high > > pending compaction count. "pending tasks: 67" while active > > compaction tasks are not more than 5. I have a 24CPU machine. > > Shouldn't I be seeing more compactions? Is this a pattern of high > > writes and compactions backing up? How can I improve this? Here are > > my thoughts. > > > > 1. Increase memtable_total_space_in_mb > > 2. Increase compaction_throughput_mb_per_sec > > 3. Increase concurrent_compactions > > > > > > Sorry if this was discussed already. Any pointers is much appreciated. > > > > Thanks, > > Kumar > > > > > > > > -- > > http://twitter.com/tjake
